/*菜单样式规则  */
.menu{
    display: flex;
    flex-direction: column;
    color: #a7b1c2;
    font-size: 14px;
    font-weight: 800;
    transition: all 0.4s;
}

.menu-group{
    display: flex;
    flex-direction: column;
    cursor: pointer;
    transition: max-height 0.4s ease-in-out;
}

.menu>.menu-item{
    padding: 0 10px 0 20px;
}

.group{
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 10px 0 20px;
}

.group-item{
    display: none;
    max-height: 0;
    -webkit-transition: max-height 1s ease-out;
}

.group-item>.menu-item{
    padding-left: 30px;
}

.menu-item,.menu-group{
    line-height: 50px;
    cursor: pointer;
}


.menu-group.active{
    border-left: 4px solid #19aa8d;
    background-color: #293846;
    max-height: 999px;
}

.active>.group{
    color: #fff;
}

.active>.group-item{
    display: block;
    max-height: 999px;
}

.group:hover,.menu-item:hover{
    color: #fff;
    background-color: #293846;
}

.active>.group>.fa-angle-left{
    transition: all 0.4s ;
    transform:rotate(-90deg);
    -ms-transform:rotate(-90deg); /* Internet Explorer */
    -moz-transform:rotate(-90deg); /* Firefox */
    -webkit-transform:rotate(-90deg); /* Safari 和 Chrome */
    -o-transform:rotate(-90deg); /* Opera */
}